• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    For the production of a road surface with a top layer of washed concrete, a method is proposed with the following steps: a) provision of a supporting underlayer, b) application of a layer (2) of a fresh concrete intended for the formation of the cover layer, c) leveling out of the fresh concrete layer, d) Adding a setting retarder to the surface of the fresh concrete layer; e) allowing the topcoat to set, and f) reworking the topcoat to form a washed concrete surface. The fact that the fresh concrete layer has a comparatively coarse-grained lower layer (4) and an overlying fine-grained upper layer (6), and that the leveling out of the fresh concrete layer comprises a rolling process with a roller (8) running counter to the advancing direction, can be achieved in an efficient manner produce homogeneous, non-slip road surface. Such road surfaces are particularly well suited for roundabouts.
    公开号:CH712337A2
    申请号:CH00479/16
    申请日:2016-04-12
    公开日:2017-10-13
    发明作者:Forster Christoph
    申请人:Kibag Bauleistungen Ag；
    IPC主号:
    专利说明:

    Description TECHNICAL FIELD The present invention relates to a method for producing a road surface, in particular for roundabouts, according to the preamble of claim 1.
    PRIOR ART Concrete conveyor corners have proven themselves worldwide because of their durability and favorable maintenance. In connection with the demand for noise reduction and to ensure the best possible and durable grip of the road surface concrete pavements with washed concrete surface have been found to be very beneficial. Accordingly, such road surfaces have been produced on a large scale both in Germany and in Austria for quite some time (see R. Werner, K. Hermann, "Modern Concrete Road Construction", Cementbulle-tin 7/8, 2000, no page, K. Bollmann et al., "Washable Concrete - New Roadway Construction", Concrete Information-2-2007, pages 32-35). In Switzerland, roadbeds made of washed concrete are used in particular for roundabouts, which, as is known, have to meet high demands on grip and load capacity.
    In a conventional method for the production of road surfaces made of washed concrete, a 4 cm thick top layer of concrete is applied, which consists of 70% of the highest quality Hartsplitt 4/8 mm. Immediately after application of the top concrete, a retarder and then a film-forming evaporation protection (barrier effect 90%) is sprayed onto the concrete surface. Thereafter, the required joints are cut as quickly as possible. After about 8 to 30 hours, the surface is brushed off, whereby the finest-grained ingredients removed and thus the coarse-grained aggregate is exposed. Optimal results with regard to noise reduction are achieved with a surface roughness of 1 mm and a profile tip distance <10 mm (see R. Werner, K. Hermann, loc. Cit.).
    A disadvantage of the known method is that many fines are "worked" to the surface, which on the one hand, the exposure by brushing is relatively complex and on the other hand there is a risk that the coarse grains are torn out by the brushing. In addition, the coarse grains on the surface, which produce the grip of the road, not sufficiently evenly distributed.
    Incidentally, the previous experience based on the machine installation, while the manual installation is virtually unknown.
    DESCRIPTION OF THE INVENTION The object of the invention is therefore to specify an improved method for producing a road surface.
    This object is achieved by the method defined in claim 1.
    The inventive method for producing a road surface, which is particularly suitable for roundabouts and which has a top layer of washed concrete, comprises the following steps: a) providing a supporting underlayer, b) orders a provided for the formation of the cover layer of a Fresh concrete, c) leveling out the fresh concrete layer, d) adding a setting retarder to the surface of the fresh concrete layer; e) allowing the topcoat to set, and f) reworking the topcoat to form a washed concrete surface.
    Characterized in that the fresh concrete layer has a comparatively coarse-grained lower layer and an overlying, relatively fine-grained upper layer, the conditions are met, on the one hand to ensure good carrying capacity and robustness of the vehicle corner and on the other hand required for the required grip and smoothness fine grain to create the surface.
    Characterized in that the leveling out of the fresh concrete layer comprises a rolling process with a direction opposite to the advancing direction roller, an enrichment of the relatively fine-grained aggregate of the upper fresh concrete layer is effected in the near-surface region of the cover layer. The largely regular arrangement of the near-surface grains makes it possible to produce a surface with a grain tip density of at least 60 tips per 25 cm 2 of road surface.
    In the result, it has been found that surprisingly, with the measures of the present invention, a road surface with outstanding properties can be produced with a reasonable effort and in a reproducible manner.
    The terms used herein are to be understood primarily as they are common in the technical language of road construction.
    Furthermore, it is understood that the cover layer of the road surface produced according to the invention is formed on a supporting lower layer, which is designed according to the respective requirements.
    The orders of the intended for the formation of the top layer of a fresh concrete, which is formed according to the invention by a comparatively coarse-grained lower layer and an overlying fine-grained upper layer, for example, by two consecutive truck mixer, the relevant fresh concrete material on the supporting sublayer output. Expediently, the lower layer is first applied and stripped off, after which the upper layer is applied and likewise stripped off, these steps typically taking place within about 20 minutes. Furthermore, a suitable set retarder is added to the surface of the top layer to leave a non-solidified cement skin in the near-surface area. The latter is later mechanically removed to expose the fine grained aggregate of the top layer to form a washed concrete surface.
    The subsequent leveling is carried out according to the invention by a rolling operation with a direction opposite to the advancing direction roller. By this is meant that the roller is driven in a direction of rotation opposite to that direction of rotation which would result from simply rolling the roller as a result of a pulling movement. Thus, in the near-surface region of the upper layer, not only a flattening is effected, but also a compaction and a redistribution of the grain components, which ultimately leads to the advantageous formation of a comparatively regular grain arrangement.
    As a result, bind the inner region of the cover layer in a known manner, however, leaving a thin cement skin on the surface by the action of the retarder. After the inner regions of the cover layer are sufficiently hardened, which usually requires several hours, the finishing of the cover layer is carried out to form the washed concrete surface.
    Advantageous embodiments are defined in the dependent claims.
    According to claim 2, the comparatively coarse-grained lower layer of the fresh concrete layer contains an aggregate with a grain size of a maximum of 32 mm. This aggregate will be referred to as "first aggregate" below. The bottom layer has a cement content of at least 320 kg / m3 and has a consistency C2, i. a compaction mass according to DIN 1045-2 from 1.25 to 1.11. The thickness of the lower layer is typically about 200 to 240 mm, in particular about 220 mm.
    According to claim 3, the comparatively fine-grained upper layer of the fresh concrete layer contains an aggregate with a maximum grain size of 8 mm. This additive is referred to below as "second aggregate. The upper layer has a cement content of at least 420 kg / m3 and also a consistency C2. The thickness of the upper layer is typically about 50 to 70 mm, in particular about 60 mm.
    According to claim 4, the second aggregate also has a default grain size between 2 and 4 mm. As a result of this gap in the particle size distribution, the aggregate is, as it were, divided into two classes, which has proved to be advantageous for the properties of the road surface.
    According to claim 5, the reworking of the set topcoat takes place to expose the aggregate by brushing. As a result of the rolling process according to the invention, the layer near the surface is already designed in such a way that brushing can take place with comparatively little effort.
    According to claim 6 can be carried out before spraying a pressurization with spray. This is especially necessary if the cement skin on the surface is already somewhat hardened and would make it difficult to brush out.
    According to claim 7, the rolling process is carried out by means of a hand-drawn, rotationally motor-driven roller. For this purpose, for example, is a designated as "Striker roller" device, which has a motor-driven steel roller with an outer diameter of about 20 cm. At the two outer ends of the device pull lines or pull chains are mounted with handle for each operator.
    BRIEF DESCRIPTION OF THE DRAWINGS Exemplary embodiments of the invention are described in more detail below with reference to the drawings, in which:
    Fig. 1 shows the production of a road surface, in perspective view;
    Fig. 2 shows the production of Figure 1, in sectional view according to the section A-A of Fig. 1.
    权利要求:
    Claims (7)
    [1]
    Fig. 3 is a schematic representation of a conventional road surface of washing concrete; and FIG. 4 shows a schematic representation of a pavement made of washed concrete produced by the method according to the invention. DETAILED DESCRIPTION OF THE INVENTION As shown in FIGS. 1 and 2, the method for producing a pavement with a cover layer 2 made of washed concrete comprises the provision of a supporting underlay, not shown, onto which a layer provided for the formation of the covering layer is made a fresh concrete is applied. In this case, the fresh concrete layer comprises a comparatively coarse-grained lower layer 4 and an overlying fine-grained upper layer 6. In order to level out the fresh concrete layer, a rolling process takes place with a roller 8 opposite to the advancing direction V, i. the roller performs a rotational movement R which has a tangential component opposite to the advancing direction V in the area of contact with the concrete surface. Due to its own weight, the roller exerts a force F on the fresh concrete layer. By this method, the required compaction and the flatness and the grain density are ensured at the surface. Fig. 3 shows the near-surface region of a washed concrete surface produced by a conventional method. Noticeable is the absence of coarse grains 10 (marked with arrows) on the surface, since they are covered with a layer of fine grains 12. Thus, an optimal grip of the road surface is not achieved. In contrast, Fig. 4 shows the near-surface region of a washed concrete surface produced by the inventive method. As can be seen, there are not only areas 12 with comparatively fine grains on the surface, but also numerous areas with individual coarse grains 10 (marked with arrows), which equates to an advantageous result. Example The washed concrete surface forms after completion the contact surface between the vehicle wheels and the roadway. This area is exposed to permanent weather (frost and heat incl. De-icing agents) as well as the mechanical stress caused by traffic, and consequently exposed to extremely high influences. The concrete is installed with a consistency between C2 and C3, compacted and deducted absolutely precise height. This is followed by leveling with a counter-rotating to the advancing direction roller. Subsequently, the surface is treated with a liquid setting retarder. After a few hours, it is brushed out, removing only the cement skin and some fine particles of the cement paste and exposing the top grains of the aggregate. This surface forms the washed concrete surface with the desired properties. claims
    A method for producing a road surface, in particular for roundabouts, wherein the road surface has a cover layer of washed concrete, and wherein the method comprises the following steps: a) providing a supporting sublayer, b) orders of a layer provided for the formation of the cover layer (2 ) of a fresh concrete, c) leveling out the fresh concrete layer, d) adding a setting retarder to the surface of the fresh concrete layer; e) allowing the topcoat to set, and f) reworking the topcoat layer to form a washed concrete surface, characterized in that the fresh concrete layer has a comparatively coarse bottom layer (4) and an overlying fine grained top layer (6), and leveling out the fresh concrete layer comprises a rolling operation comprising a counter to the advancing direction of the roller (8).
    [2]
    2. The method of claim 1, wherein the lower layer of the fresh concrete layer contains a first aggregate with a grain size of a maximum of 32 mm and a cement content of at least 320 kg / m3 and a consistency C2.
    [3]
    3. The method of claim 1 or 2, wherein the upper layer of the fresh concrete layer contains a second aggregate with a maximum grain size of 8 mm and a cement content of at least 420 kg / m3 and a consistency C2.
    [4]
    4. The method of claim 3, wherein the second aggregate has a default grain size of between 2 and 4 mm.
    [5]
    5. The method according to any one of claims 1 to 4, wherein the reworking of the set topcoat is carried out by brushing.
    [6]
    6. The method of claim 5, wherein before brushing takes place an application of water spray.
    [7]
    7. The method according to any one of claims 1 to 6, wherein the rolling operation by means of a hand-drawn, rotationally motor-driven roller.
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    同族专利:
    公开号 | 公开日
    CH712337B1|2020-04-30|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH00479/16A|CH712337B1|2016-04-12|2016-04-12|Process for the production of a road surface, in particular for traffic gyros.|CH00479/16A| CH712337B1|2016-04-12|2016-04-12|Process for the production of a road surface, in particular for traffic gyros.|
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